Journal of China University of Geosciences最新文献

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Biogeochemical Records at Shangsi Section, Northeast Sichuan in China: The Permian Paleoproductivity Proxies 川东北上寺剖面生物地球化学记录:二叠纪古生产力近系
Journal of China University of Geosciences Pub Date : 2008-10-01 DOI: 10.1016/S1002-0705(08)60051-5
Ma Zhongwu , Hu Chaoyong , Yan Jiaxin , Xie Xinong
{"title":"Biogeochemical Records at Shangsi Section, Northeast Sichuan in China: The Permian Paleoproductivity Proxies","authors":"Ma Zhongwu ,&nbsp;Hu Chaoyong ,&nbsp;Yan Jiaxin ,&nbsp;Xie Xinong","doi":"10.1016/S1002-0705(08)60051-5","DOIUrl":"https://doi.org/10.1016/S1002-0705(08)60051-5","url":null,"abstract":"<div><p>The marine primary producers assimilate the atmospheric CO<sub>2</sub> to form the organic carbon in surface water. The organic carbon then settles down through the water column and is removed from the oceans by final preservation in sediments in the form of petroleum or nature gases. The reconstruction of paleoproductivity will thus improve our understanding of the biological processes in the formation of fossil energy resource and help to locate new sites for future exploration. In this study, biorelated elements P, Cd, Al, Ba, as well as redox sensitive element Mo, were analyzed in the 448 rock samples collected from Permian strata at the Shangsi Section, Guangyuan, Northeast Sichuan in China. On the basis of the Ti content, the nondetrital contents of P, Ca, and Al, denoted as P<sub>xs</sub>, Cd<sub>xs</sub>, and Al<sub>xs</sub>, were calculated and found to coincide with the TOC content throughout the whole section, with some enrichment intervals being found in the middle part of Chihsia Formation, topmost Maokou Formation, and Dalong Formation. This suggests that the biorelated elements could be used as proxies for the paleoproductivity here in this section. Ba<sub>xs</sub>, a paleoproductivity indicator widely used in the paleoceanography, shows insignificant correlation with TOC, P<sub>xs</sub>, Cd<sub>xs</sub>, and Al<sub>xs</sub>, probably arising from the loss of biological barium in anoxic conditions. Compiled with the data of TOC content and P<sub>xs</sub>, Cd<sub>xs</sub>, and Al<sub>xs</sub>, three episodes of enhanced paleoproductivity were identified in Permian strata including the middle part of Chihsia Formation, topmost Maokou Formation, and Dalong Formation.</p></div>","PeriodicalId":100762,"journal":{"name":"Journal of China University of Geosciences","volume":"19 5","pages":"Pages 461-470"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1002-0705(08)60051-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72246132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Carbon Isotope Records Indicative of Paleoceanographical Events at the Latest Permian Dalong Formation at Shangsi, Northeast Sichuan, China 川东北上寺大龙组晚二叠世古海洋事件的碳同位素记录
Journal of China University of Geosciences Pub Date : 2008-10-01 DOI: 10.1016/S1002-0705(08)60053-9
Bai Xiao , Luo Genming , Wu Xia , Wang Youzhen , Huang Junhua , Wang Xinjun
{"title":"Carbon Isotope Records Indicative of Paleoceanographical Events at the Latest Permian Dalong Formation at Shangsi, Northeast Sichuan, China","authors":"Bai Xiao ,&nbsp;Luo Genming ,&nbsp;Wu Xia ,&nbsp;Wang Youzhen ,&nbsp;Huang Junhua ,&nbsp;Wang Xinjun","doi":"10.1016/S1002-0705(08)60053-9","DOIUrl":"https://doi.org/10.1016/S1002-0705(08)60053-9","url":null,"abstract":"<div><p>Paired organic and carbonate carbon isotope compositions of Late Permian Wujiaping and Dalong formations at Shangsi, Northeast Sichuan were analyzed by MAT 251. An abrupt negative excursion in the two isotope records was observed in the middle part of Dalong Formation, in association with a drop in the carbon isotope difference of the two records and an increase of total organic carbon (TOC) content. The negative drop of the paired carbon isotope records is suggestive of the input of <sup>12</sup>C-enriched CO<sub>2</sub>. The molecular ratios of pristane to phytane and dibenzothiophene to phenanthrene indicate the anoxic condition in this interval. The enhanced TOC content is indicative of the elevated preservation of organic matter due to the anoxic condition. These isotopic and organic geochemical data probably infer the occurrence of the upwelling in this interval. The additional contribution of volcanism activity observed in South China cannot be excluded to the input of <sup>12</sup>C-enriched CO<sub>2</sub> and the negative shifts in carbon isotope composition of bulk organic matter and carbonate.</p></div>","PeriodicalId":100762,"journal":{"name":"Journal of China University of Geosciences","volume":"19 5","pages":"Pages 481-487"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1002-0705(08)60053-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72282088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Depositional and Ecological Features of Permian Oxygen Deficient Deposits at Shangsi Section, Northeast Sichuan, China 川东北上寺剖面二叠纪缺氧矿床的沉积与生态特征
Journal of China University of Geosciences Pub Date : 2008-10-01 DOI: 10.1016/S1002-0705(08)60054-0
Ma Zhixin , Yan Jiaxin , Xie Xinong , Ruan Xiaoyan , Li Bo
{"title":"Depositional and Ecological Features of Permian Oxygen Deficient Deposits at Shangsi Section, Northeast Sichuan, China","authors":"Ma Zhixin ,&nbsp;Yan Jiaxin ,&nbsp;Xie Xinong ,&nbsp;Ruan Xiaoyan ,&nbsp;Li Bo","doi":"10.1016/S1002-0705(08)60054-0","DOIUrl":"https://doi.org/10.1016/S1002-0705(08)60054-0","url":null,"abstract":"<div><p>Because oxygen deficient conditions enhance the preservation of depositional organic matter, analysis on paleooxygenation conditions of depositional environments becomes a routine work in evaluations of potential hydrocarbon source rocks. The article focuses on depositional and ecological features relating to oxygen deficient shelfal environments at the Shangsi Section, as a part of multidiscipline collaboration to reevaluate the hydrocarbon potential of the Middle and Upper Permian, Guangyuan, Northeast Sichuan Province. Ichnofabric <em>Zoophycos</em>, sepiolite-bearing limestones (SBL) were interpreted as indicators of dysaerobic environments. Laminated calcareous and/or siliceous mudstones with pelagic ammonites and radiolarians were believed to be the deposits of anaerobic environments. When rhythmic succession was considered, average strategy was adopted for the oxygenation explanation of a given interval. The anaerobic condition in this Permian section was observed in the upper part of the latest Permian Dalong Formation, in which siliceous mudstones with ammonite, radiolarians develop in association with lower U/Mo ratio, lower biomarker ratio of Pr/Ph, and the highest TOC content. The topmost Maokou Formation, featured by thin-bedded calcareous and siliceous mudstones with ammonite, thin-shelled bivalves, and laminations would be deposits of the quasianaerobic condition. The middle part of the Members I and III of the Chihsia Formation is proposed to be dysaerobic condition as indicated by occurrences of SBL and ichnofabric features, with the Member III being the severe dysaerobic condition.</p></div>","PeriodicalId":100762,"journal":{"name":"Journal of China University of Geosciences","volume":"19 5","pages":"Pages 488-495"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1002-0705(08)60054-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72282086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Guadalupian (Middle Permian) Conodont Faunas at Shangsi Section, Northeast Sichuan Province 川东北上思剖面瓜达鲁阶(中二叠世)牙形刺动物群
Journal of China University of Geosciences Pub Date : 2008-10-01 DOI: 10.1016/S1002-0705(08)60050-3
Sun Yadong , Lai Xulong , Jiang Haishui , Luo Genming , Sun Si , Yan Chunbo , Paul B Wignall
{"title":"Guadalupian (Middle Permian) Conodont Faunas at Shangsi Section, Northeast Sichuan Province","authors":"Sun Yadong ,&nbsp;Lai Xulong ,&nbsp;Jiang Haishui ,&nbsp;Luo Genming ,&nbsp;Sun Si ,&nbsp;Yan Chunbo ,&nbsp;Paul B Wignall","doi":"10.1016/S1002-0705(08)60050-3","DOIUrl":"https://doi.org/10.1016/S1002-0705(08)60050-3","url":null,"abstract":"<div><p>This study recovered the Guadalupian conodont faunas from Shangsi Section in Northeast Sichuan. Four genera and nine species were identified, and three conodont zones were recognized and established; they include <em>Jinogondolella nankingensis</em> Zone, <em>J. aserrata</em> Zone, and <em>J. postserrata</em> Zone. The Roadian and Wordian boundary is set in the interval 5 m from the top of Bed 86 by the first appearance of the conodont <em>J. aserrata</em>. The Wordian and Capitanian boundary is set in the interval 2.3 m from the top of the Bed 95 by the first appearance of <em>J. postserrata</em>. Most of the specimens demonstrated low color alteration index (CAI) as 1.5–3, indicating that most part of the Maokou Formation may have the suitable thermal conditions for the formation of oil source rocks.</p></div>","PeriodicalId":100762,"journal":{"name":"Journal of China University of Geosciences","volume":"19 5","pages":"Pages 451-460"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1002-0705(08)60050-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72246133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 28
Biogeochemical Records at Shangsi Section, Northeast Sichuan in China: The Permian Paleoproductivity Proxies 川东北上寺剖面生物地球化学记录:二叠系古生产力代用物
Journal of China University of Geosciences Pub Date : 2008-10-01 DOI: 10.1016/S1002-0705(08)60051-5
Ma Zhongwu, Hu Chaoyong, Yang Jiaxin, Xie Xinong
{"title":"Biogeochemical Records at Shangsi Section, Northeast Sichuan in China: The Permian Paleoproductivity Proxies","authors":"Ma Zhongwu, Hu Chaoyong, Yang Jiaxin, Xie Xinong","doi":"10.1016/S1002-0705(08)60051-5","DOIUrl":"https://doi.org/10.1016/S1002-0705(08)60051-5","url":null,"abstract":"","PeriodicalId":100762,"journal":{"name":"Journal of China University of Geosciences","volume":"82 1","pages":"461-470"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74984758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Impact of Montmorillonite and Calcite on Release and Adsorption of Cyanobacterial Fatty Acids at Ambient Temperature 常温下蒙脱土和方解石对蓝藻脂肪酸释放和吸附的影响
Journal of China University of Geosciences Pub Date : 2008-10-01 DOI: 10.1016/S1002-0705(08)60058-8
Liu Deng, Yang Xiaofen, W. Hongmei, Li Jihong, Sun Nian
{"title":"Impact of Montmorillonite and Calcite on Release and Adsorption of Cyanobacterial Fatty Acids at Ambient Temperature","authors":"Liu Deng, Yang Xiaofen, W. Hongmei, Li Jihong, Sun Nian","doi":"10.1016/S1002-0705(08)60058-8","DOIUrl":"https://doi.org/10.1016/S1002-0705(08)60058-8","url":null,"abstract":"","PeriodicalId":100762,"journal":{"name":"Journal of China University of Geosciences","volume":"6 1","pages":"526-533"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73067344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Assessment on Redox Conditions and Organic Burial of Siliciferous Sediments at the Latest Permian Dalong Formation in Shangsi, Sichuan, South China 四川上寺晚二叠世大龙组硅系沉积物氧化还原条件及有机质埋藏评价
Journal of China University of Geosciences Pub Date : 2008-10-01 DOI: 10.1016/S1002-0705(08)60055-2
Zhou Lian, Z. Haiqiang, W. Jin, Hu Junhua, Xie Xinong
{"title":"Assessment on Redox Conditions and Organic Burial of Siliciferous Sediments at the Latest Permian Dalong Formation in Shangsi, Sichuan, South China","authors":"Zhou Lian, Z. Haiqiang, W. Jin, Hu Junhua, Xie Xinong","doi":"10.1016/S1002-0705(08)60055-2","DOIUrl":"https://doi.org/10.1016/S1002-0705(08)60055-2","url":null,"abstract":"","PeriodicalId":100762,"journal":{"name":"Journal of China University of Geosciences","volume":"49 1","pages":"496-506"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84880582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Preliminary Estimation of Paleoproductivity via TOC and Habitat Types:Which Method Is More Reliable?——A Case Study on the Ordovician-Silurian Transitional Black Shales of the Upper Yangtze Platform, South China 利用TOC和生境类型初步估算古生产力:哪种方法更可靠?——以华南上扬子地台奥陶系—志留系过渡型黑色页岩为例
Journal of China University of Geosciences Pub Date : 2008-10-01 DOI: 10.1016/S1002-0705(08)60059-X
Su Wenbo, Wang Yongbiao, B. Cramer, A. Munnecke, Liu Zhiming, Fu Li-pu
{"title":"Preliminary Estimation of Paleoproductivity via TOC and Habitat Types:Which Method Is More Reliable?——A Case Study on the Ordovician-Silurian Transitional Black Shales of the Upper Yangtze Platform, South China","authors":"Su Wenbo, Wang Yongbiao, B. Cramer, A. Munnecke, Liu Zhiming, Fu Li-pu","doi":"10.1016/S1002-0705(08)60059-X","DOIUrl":"https://doi.org/10.1016/S1002-0705(08)60059-X","url":null,"abstract":"","PeriodicalId":100762,"journal":{"name":"Journal of China University of Geosciences","volume":"14 1","pages":"534-548"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80028696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Assessment on Redox Conditions and Organic Burial of Siliciferous Sediments at the Latest Permian Dalong Formation in Shangsi, Sichuan, South China 四川上思晚二叠世大龙组含硅沉积物氧化还原条件及有机埋藏评价
Journal of China University of Geosciences Pub Date : 2008-10-01 DOI: 10.1016/S1002-0705(08)60055-2
Zhou Lian , Zhang Haiqiang , Wang Jin , Huang Junhua , Xie Xinong
{"title":"Assessment on Redox Conditions and Organic Burial of Siliciferous Sediments at the Latest Permian Dalong Formation in Shangsi, Sichuan, South China","authors":"Zhou Lian ,&nbsp;Zhang Haiqiang ,&nbsp;Wang Jin ,&nbsp;Huang Junhua ,&nbsp;Xie Xinong","doi":"10.1016/S1002-0705(08)60055-2","DOIUrl":"https://doi.org/10.1016/S1002-0705(08)60055-2","url":null,"abstract":"<div><p>The redox sensitive elements, molybdenum (Mo) and uranium (U), in marine sediments from the latest Permian Dalong Formation at the Shangsi Section, Northeast Sichuan, South China, were analyzed by inductively coupled plasma mass spectrometry (ICP-MS) to determine their response to a range of redox conditions, and to estimate the organic carbon burial rate. On the basis of the correlation between authigenic Mo abundance and organic carbon content in modern oceans, the organic carbon burial rates were calculated for the rocks at Dalong Formation, ranging from 0.48–125.83 mmol/(m<sup>2</sup>·d), which shows a larger range than the mineralization rate of organic carbon at the continental margins (1.6–4.23 mmol/(m<sup>2</sup>·d)). The Zr-normalized Mo and U abundances show large fluctuations in the entire section. The maxima of Zr-normalized Mo abundance and thus the maxima of the organic carbon burial rates were observed at the interval between the 155th and 156th beds (404–407 m above the base of Middle Permian). A decrease (the minimum) in U/Mo ratios is present in this interval. It is speculated that the oxygen-limited conditions and ultimately anoxia or euxinia may develop within this depth interval. In contrast, an enhanced enrichment of Zr-normalized U abundance is found, in association with less enrichment in Zr-normalized Mo abundance in the interval from the 151st to 154th beds (395–404 m above the base of Middle Permian), inferring the dominance of a suboxic/anoxic depositional condition (denitrifying condition), or without free H<sub>2</sub>S. The presence of small quantities of dissolved oxygen may have caused the solubilization and loss of Mo from sediments. It is proposed that the multiple cycles of abrupt oxidation and reduction due to the upwelling at this interval lead to the enhanced accumulation of authigenic U, but less enrichment of Mo. A decrease in the contents of U, Mo, and TOC is found above the 157th bed (407 m above the base of Middle Permian), in association with the enhanced U/Mo ratio, suggesting the overall oxic conditions at the end of the Dalong Formation.</p></div>","PeriodicalId":100762,"journal":{"name":"Journal of China University of Geosciences","volume":"19 5","pages":"Pages 496-506"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1002-0705(08)60055-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72246122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Molecular Records of Primary Producers and Sedimentary Environmental Conditions of Late Permian Rocks in Northeast Sichuan, China 川东北晚二叠世岩石原生生产者的分子记录及沉积环境条件
Journal of China University of Geosciences Pub Date : 2008-10-01 DOI: 10.1016/S1002-0705(08)60052-7
Ruan Xiaoyan , Luo Genming , Hu Shouzhi , Chen Feng , Sun Si , Wu Wenjun , Guo Qiaozhen , Liu Guoquan
{"title":"Molecular Records of Primary Producers and Sedimentary Environmental Conditions of Late Permian Rocks in Northeast Sichuan, China","authors":"Ruan Xiaoyan ,&nbsp;Luo Genming ,&nbsp;Hu Shouzhi ,&nbsp;Chen Feng ,&nbsp;Sun Si ,&nbsp;Wu Wenjun ,&nbsp;Guo Qiaozhen ,&nbsp;Liu Guoquan","doi":"10.1016/S1002-0705(08)60052-7","DOIUrl":"https://doi.org/10.1016/S1002-0705(08)60052-7","url":null,"abstract":"<div><p>A series of biomarkers were identified in the aliphatic and aromatic fractions of the extracts from Late Permian Dalong and Wujiaping formations in Shangsi Section, Northeast Sichuan, South China, on the basis of the analysis of gas chromatography-mass spectrometry (GC-MC). The dominance of lower-molecular-weight <em>n</em>-alkanes throughout the profile suggests the dominant contribution of algae and bacteria to the organics preserved in the marine section. Wujiaping Formation is characterized by the elevated contribution from algae as well as other photoautotrophs such as photosynthetic bacteria as shown by the molecular ratios of hopanes to steranes or tricyclic terpanes as well as the ratio of pristane (Pr) and phytane (Ph) to C<sub>17</sub> and C<sub>18</sub> <em>n</em>-alkanes. This is in accord with the data from the microscopic measurement on the calcareous algae. In contrast, Dalong Formation is featured by enhanced contribution from bacteria and probably terrestrial organics indicated by the enhanced C<sub>24</sub> tetracyclic terpanes relative to tricyclic terpanes. The two formations also show a distinct discrimination in sedimentary environmental conditions including redox condition and salinity. The anoxic condition was only found in the middle of the Dalong Formation as shown by the ratios of Pr/Ph and dibenzothiophene to phenanthrene, consistent with the reported data of Mo and U. An enhanced salinity indicated by the homohopane index is observed at the shallow Wujiaping Formation. On the basis of the composition of primary productivity and the redox condition, Dalong Formation is proposed, herein, to be potential hydrocarbon source rocks in the study site. It is notable that the topmost end-Permian is characterized by a large perturbance in both the redox condition and salinity, with oxic conditions being frequently interrupted by short-term anoxia, likely showing a causal relationship with the episodic biotic crisis across the Permian—Triassic boundary.</p></div>","PeriodicalId":100762,"journal":{"name":"Journal of China University of Geosciences","volume":"19 5","pages":"Pages 471-480"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1002-0705(08)60052-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72246131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
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